US4869870A
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Aluminum-lithium alloys with hafnium
Assignee: Alcoa Corp
•
Filing: 1988-03-24
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Granted: 1989-09-26
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Expires: 2008-03-24
Abstract
Abstract An aluminum base alloy suitable for forming into a wrought product having improved combinations of strength and fracture toughness is provided. The alloy is comprised of 0.2 to 5.0 wt. % Li, 0.05 to 6.0 wt. % Mg, 0.2 to 5.0 wt. % Cu, 0 to 2.0 wt. % Mn, 0 to 1.0 wt. % Zr, 0.05 to 12.0 wt. % Zn, 0.05 to 1.0 wt. % Hf, 0.5 wt. % max. Fe, 0.5 wt. % max. Si, the balance aluminum and incidental impurities.
Inventors
- 👤 Roberto J. Rioja
- 👤 Philip E. Bretz
- 👤 John Jacoby
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 21:54
CPC Classifications
C; C22; C22C; C22C21/00; C22C21/06; C22C21/10; C22C21/12; C22C21/16
Claims Analysis
Total Claims: 28
Claim 1
Independent Claim
82 words
An aluminum base alloy suitable for forming into a wrought product having improved combinations of strength and fracture toughness, the alloy consisting essentially of 0.2 to 5.0 wt. % Li, 0.05 to 6.0 wt. % Mg, 0.2 to 5.0 wt. % Cu, 0 to 2.0 wt. % Mn, 0 to 1.0 wt. % Zr, 0.05 to 12.0 wt. % Zn, 0.05 to 1.0 wt. % Hf, 0.5 wt. % max. Fe, 0.5 wt. % max. Si, the balance aluminum and incidental impurities.
Claim 2
Dependent Claim
82 words
An aluminum base alloy suitable for forming into a wrought product having improved combinations of strength and fracture toughness, the alloy consisting essentially of 0.2 to 5.0 wt. % Li, 0.05 to 6.0 wt. % Mg, 0.2 to 5.0 wt. % Cu, 0 to 2.0 wt. % Mn, 0 to 1.0 wt. % Zr, 0.05 to 12.0 wt. % Zn, 0.05 to 1.0 wt. % Hf, 0.5 wt. % max. Fe, 0.5 wt. % max. Si, the balance aluminum and incidental impurities.
Claim 3
Dependent Claim
19 words
The alloy in accordance with claim 1 wherein Li is in the range of 1.0 to 4.0 wt. %.
Claim 4
Dependent Claim
19 words
The alloy in accordance with claim 1 wherein Cu is in the range of 1.0 to 5.0 wt. %.
Claim 5
Dependent Claim
18 words
The alloy in accordance with claim 1 wherein Li in the range of 1.5 to 3.0 wt. %.
Claim 6
Dependent Claim
19 words
The alloy in accordance with claim 1 wherein Li is in the range of 1.8 to 2.5 wt. %.
Claim 7
Dependent Claim
19 words
The alloy in accordance with claim 1 wherein Cu is in the range of 1.5 to 3.0 wt. %.
Claim 8
Dependent Claim
19 words
The alloy in accordance with claim 1 wherein Cu is in the range of 2.5 to 3.0 wt. %.
Claim 9
Dependent Claim
19 words
The alloy in accordance with claim 1 wherein Mg is in the range of 0.2 to 2.5 wt. %.
Claim 10
Dependent Claim
19 words
The alloy in accordance with claim 1 wherein Mg is in the range of 0.2 to 2.0 wt. %.
Claim 11
Dependent Claim
19 words
The alloy in accordance with claim 1 wherein Zn is in the range of 0.2 to 11.0 wt. %.
Claim 12
Dependent Claim
19 words
The alloy in accordance with claim 1 wherein Zn is in the range of 0.2 to 2.0 wt. %.
Claim 13
Dependent Claim
19 words
The alloy in accordance with claim 1 wherein Zr is in the range of 0.06 to 0.12 wt. %.
Claim 14
Dependent Claim
19 words
The alloy in accordance with claim 1 wherein Hf is in the range of 0.08 to 0.6 wt. %.
Claim 15
Dependent Claim
17 words
The alloy in accordance with claim 1 which includes V in the range of 0.05 to 0.2.
Claim 16
Dependent Claim
17 words
The alloy in accordance with claim 1 which includes Mn in the range of 0 to 0.6.
Claim 17
Dependent Claim
82 words
An aluminum base alloy suitable for forming into a wrought product having improved combinations of strength and fracture toughness, the alloy consisting essentially of 1.5 to 3.0 wt. % Li, 0.2 to 2.5 wt. % Mg, 1.5 to 3.0 wt. % Cu, 0.08 to 0.12 wt. % Zr, 0.2 to 11.0 wt. % Zn, 0.08 to 0.12 wt. % Hf, 0.03 to 0.3 wt. % Mn, 0.5 wt. % max. Fe, 0.5 wt. % max. Si, the balance aluminum and incidental impurities.
Claim 18
Dependent Claim
82 words
An aluminum base alloy suitable for forming into a wrought product having improved combinations of strength and fracture toughness, the alloy consisting essentially of 1.5 to 3.0 wt. % Li, 0.2 to 2.5 wt. % Mg, 1.5 to 3.0 wt. % Cu, 0.08 to 0.12 wt. % Zr, 0.2 to 11.0 wt. % Zn, 0.08 to 0.12 wt. % Hf, 0.03 to 0.3 wt. % Mn, 0.5 wt. % max. Fe, 0.5 wt. % max. Si, the balance aluminum and incidental impurities.
Claim 19
Dependent Claim
81 words
An aluminum base alloy suitable for forming into a wrought product having improved combinations of strength and fracture toughness, the alloy consisting essentially of 1.8 to 2.5 wt. % Li, 0.2 to 2.0 wt. % Mg, 2.5 to 3.0 wt. % Cu, 0.08 to 0.12 wt. % Zr, 0.2 to 2.0 wt. % Zn, 0.08 to 0.15 wt. % Hf, 0.5 wt. % max. Fe, 0.25 wt. % max. Ti 0.5 wt. % max. Si, the balance aluminum and incidental impurities.
Claim 20
Dependent Claim
81 words
An aluminum base alloy suitable for forming into a wrought product having improved combinations of strength and fracture toughness, the alloy consisting essentially of 1.8 to 2.5 wt. % Li, 0.2 to 2.0 wt. % Mg, 2.5 to 3.0 wt. % Cu, 0.08 to 0.12 wt. % Zr, 0.2 to 2.0 wt. % Zn, 0.08 to 0.15 wt. % Hf, 0.5 wt. % max. Fe, 0.25 wt. % max. Ti 0.5 wt. % max. Si, the balance aluminum and incidental impurities.
Claim 21
Dependent Claim
19 words
The alloy in accordance with claim 15 wherein V is in the range of 0.05 to 0.2 wt. %.
Claim 22
Dependent Claim
19 words
The alloy in accordance with claim 16 wherein V is in the range of 0.05 to 0.2 wt. %.
Claim 23
Dependent Claim
88 words
An aluminum base alloy suitable for forming into a wrought product having improved combinations of strength and fracture toughness, the alloy consisting essentially of 0.2 to 5.0 wt. % Li, 0.05 to 6.0 wt. % Mg, 0.2 to 5.0 wt. % Cu, 0 to 2.0 wt. % Mn, 0 to 1.0 wt. % Zr, 0.05 to 12.0 wt. % Zn, 0.05 to 0.3 wt. % V, 0.05 to 1.0 wt. % Hf 0.5 wt. % max. Fe, 0.5 wt. % max. Si, the balance aluminum and incidental impurities.
Claim 24
Dependent Claim
88 words
An aluminum base alloy suitable for forming into a wrought product having improved combinations of strength and fracture toughness, the alloy consisting essentially of 0.2 to 5.0 wt. % Li, 0.05 to 6.0 wt. % Mg, 0.2 to 5.0 wt. % Cu, 0 to 2.0 wt. % Mn, 0 to 1.0 wt. % Zr, 0.05 to 12.0 wt. % Zn, 0.05 to 0.3 wt. % V, 0.05 to 1.0 wt. % Hf 0.5 wt. % max. Fe, 0.5 wt. % max. Si, the balance aluminum and incidental impurities.
Claim 25
Dependent Claim
87 words
An aluminum base alloy suitable for forming into a wrought product having improved combinations of strength and fracture toughness, the alloy consisting essentially of 1.5 to 3.0 wt. % Li, 0.2 to 2.5 wt. % Mg, 1.5 to 3.0 wt. % Cu, 0.08 to 0.12 wt. % Zr, 0.2 to 11.0 wt. % Zn, 0.05 to 0.2 wt. % V, 0.05 to 1.0 wt. % Hf0.03 to 0.3 wt. % Mn, 0.5 wt. % max. Fe, 0.5 wt. % max. Si, the balance aluminum and incidental impurities.
Claim 26
Dependent Claim
87 words
An aluminum base alloy suitable for forming into a wrought product having improved combinations of strength and fracture toughness, the alloy consisting essentially of 1.5 to 3.0 wt. % Li, 0.2 to 2.5 wt. % Mg, 1.5 to 3.0 wt. % Cu, 0.08 to 0.12 wt. % Zr, 0.2 to 11.0 wt. % Zn, 0.05 to 0.2 wt. % V, 0.05 to 1.0 wt. % Hf0.03 to 0.3 wt. % Mn, 0.5 wt. % max. Fe, 0.5 wt. % max. Si, the balance aluminum and incidental impurities.
Claim 27
Dependent Claim
87 words
An aluminum base alloy suitable for forming into a wrought product having improved combinations of strength and fracture toughness, the alloy consisting essentially of 1.8 to 2.5 wt. % Li, 0.2 to 2.0 wt. % Mg, 2.5 to 3.0 wt. % Cu, 0.08 to 0.12 wt. % Zr, 0.2 to 2.0 wt. % Zn, 0.05 to 0.2 wt. % V, 0.05 to 1.0 wt. % Hf 0.5 wt. % max. Fe, 0.25 wt. % max. Ti 0.5 wt. % max. Si, the balance aluminum and incidental impurities.
Claim 28
Dependent Claim
87 words
An aluminum base alloy suitable for forming into a wrought product having improved combinations of strength and fracture toughness, the alloy consisting essentially of 1.8 to 2.5 wt. % Li, 0.2 to 2.0 wt. % Mg, 2.5 to 3.0 wt. % Cu, 0.08 to 0.12 wt. % Zr, 0.2 to 2.0 wt. % Zn, 0.05 to 0.2 wt. % V, 0.05 to 1.0 wt. % Hf 0.5 wt. % max. Fe, 0.25 wt. % max. Ti 0.5 wt. % max. Si, the balance aluminum and incidental impurities.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-09-25 | 1993-03-27 | 1993-09-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-09-25 | 1997-03-27 | 1997-09-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-09-25 | 2001-03-27 | 2001-09-26 | $7700.00 | Window Closed / Lapsed |